ref: 180f955e94367d0439cee3d0e7ad7606afab1fb1 dir: /sys/src/ape/lib/ap/plan9/setuid.c/
#include <sys/types.h> #include <unistd.h> #include <errno.h> /* * BUG: never works */ int setuid(uid_t uid) { errno = EPERM; return -1; }